DIY Dungeons and Dragons Terrain 

loved watching the trick with the heat gun, was like some sort of magic. cool game board

This is pretty rough. With that being said, it works and for a first attempt it is pretty good. The next step is glueing your large tiles down to some mdf to keep it flat. The doors are probably the place where you can make the most improvement. It is a great start and miles ahead of paper dungeon maps. I am going to hang around and see how you get better over time.